PT-2021-21191 · Zephyr · Zephyr

D3Zd3Z · Published 2021-10-05 · Updated 2021-10-13 · CVE-2021-3625

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Zephyr versions >= v2.5.0

Description A buffer overflow issue exists in the Zephyr USB DFU DNLOAD, specifically a Heap-based Buffer Overflow (CWE-122).

Recommendations For Zephyr versions >= v2.5.0, consider disabling the USB DFU DNLOAD functionality until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

CVE-2021-3625

GHSA-C3GR-HGVR-F363

Affected Products

Zephyr

References · 8

• 🔥 https://github.com/szymonh/zephyr_cve-2021-3625 · Exploit
• 🔥 http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-c3gr-hgvr-f363 · Exploit
• https://osv.dev/vulnerability/CVE-2021-3625 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-3625 · Security Note
• https://t.me/cybersecuritytechnologies/4461 · Telegram Post
• https://t.me/cvenotify/21956 · Telegram Post
• https://t.me/freedomf0x/14230 · Telegram Post
• https://t.me/cibsecurity/30008 · Telegram Post